PteroDynamics is a venture-backed aircraft manufacturer that has developed a patented VTOL (vertical takeoff and landing) aircraft design called Transwing that folds its wings during flight to transition between rotorcraft and fixed-wing configurations. It's unlike any other aircraft and has many critical advantages, the greatest being several times longer range and endurance for any given energy source, payload, and ground footprint. This is essential for everything from drone delivery to air taxis (so-called urban air mobility) with extensive government, military, industrial, agricultural, and commercial applications as well. See PteroDynamics.com for details, including video of our flying models with wingspans up to 12 ft.